Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual bolsa média foi ganha por Erika Wicoff e tem uma parte do vencedor maior que $9,750?
 ###Tabelas: CREATE TABLE population_area_and_density_sortable_on_each_field (population_area_and_density_sortable_on_each_field_id AUTO_INCREMENT PRIMARY KEY, Province VARCHAR, Population (2004 estimate) INT, Area (km²) INT, Density VARCHAR, GDP (2003, PPS in mil. € ) INT, GDP per cap. (2003, in €) INT) CREATE TABLE subsidiaries_and_associates (subsidiaries_and_associates_id AUTO_INCREMENT PRIMARY KEY, Company VARCHAR, Type VARCHAR, Principal activities VARCHAR, Incorporated in VARCHAR, Group's Equity Shareholding (10 March 2010) VARCHAR) CREATE TABLE winners (winners_id AUTO_INCREMENT PRIMARY KEY, Year VARCHAR, Champion VARCHAR, Country VARCHAR, Score VARCHAR, Purse ($) INT, Winner's share ($) INT) CREATE TABLE literature (literature_id AUTO_INCREMENT PRIMARY KEY, Name VARCHAR, Deceased Spouse VARCHAR, Cause of Death VARCHAR, Date of Spouses Death VARCHAR, Length of Marriage VARCHAR, Children Together VARCHAR, Current Marital Status VARCHAR) CREATE TABLE winning_head_of_the_river_championship_events (winning_head_of_the_river_championship_events_id AUTO_INCREMENT PRIMARY KEY, Crew INT, Open 1st VIII VARCHAR, Open 2nd VIII VARCHAR, Open 3rd VIII VARCHAR, U16 1st VIII VARCHAR, U16 2nd VIII VARCHAR, U16 3rd VIII VARCHAR, U15 1st Quad VARCHAR, U15 2nd Quad VARCHAR, U15 3rd Quad VARCHAR, U15 4th Quad VARCHAR, U15 5th Quad VARCHAR, U15 6th Quad VARCHAR)  
SELECT AVG Purse ($) FROM winners WHERE Champion = erika wicoff AND Winner's share ($) > 9,750